99 Ford F-250 Superduty...What size/length for factory front bumper bolts?

[HondaCowboy82]

Took the Ranchhand bumper off my 99 F-250 Superduty. Just got my new bumper in and i was just wondering if anybody knew what size and length of bolts are required to reattach the OEM bumper?

 

[Double-S-Diesel]

the stock ones areconnected together by a bar, and have cap nuts on the outside.
size wise, a 1/2 bolt about 1 1/4" long should work in thier place